X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=matita%2Fmatita%2Fcontribs%2Flambdadelta%2Fbasic_2%2Fs_computation%2Ffqup_drops.ma;fp=matita%2Fmatita%2Fcontribs%2Flambdadelta%2Fbasic_2%2Fs_computation%2Ffqup_drops.ma;h=fbcca9516abb818b14cc447f703524476bb8c6e1;hb=75f395f0febd02de8e0f881d918a8812b1425c8d;hp=f669ff80e2ad3c30d2740678edfd12905a709ff1;hpb=d59f344b1e4b377e2f06abd9f8856d686d21b222;p=helm.git

diff --git a/matita/matita/contribs/lambdadelta/basic_2/s_computation/fqup_drops.ma b/matita/matita/contribs/lambdadelta/basic_2/s_computation/fqup_drops.ma
index f669ff80e..fbcca9516 100644
--- a/matita/matita/contribs/lambdadelta/basic_2/s_computation/fqup_drops.ma
+++ b/matita/matita/contribs/lambdadelta/basic_2/s_computation/fqup_drops.ma
@@ -19,7 +19,7 @@ include "basic_2/s_computation/fqup.ma".
 
 (* Properties with generic slicing for local environments *******************)
 
-lemma fqup_drops_succ: ∀b,G,K,T,i,L,U. ⬇*[⫯i] L ≡ K → ⬆*[⫯i] T ≡ U →
+lemma fqup_drops_succ: ∀b,G,K,T,i,L,U. ⬇*[⫯i] L ≘ K → ⬆*[⫯i] T ≘ U →
                        ⦃G, L, U⦄ ⊐+[b] ⦃G, K, T⦄.
 #b #G #K #T #i elim i -i
 [ #L #U #HLK #HTU elim (drops_inv_succ … HLK) -HLK
@@ -32,7 +32,7 @@ lemma fqup_drops_succ: ∀b,G,K,T,i,L,U. ⬇*[⫯i] L ≡ K → ⬆*[⫯i] T ≡
 ]
 qed.
 
-lemma fqup_drops_strap1: ∀b,G1,G2,L1,K1,K2,T1,T2,U1,i. ⬇*[i] L1 ≡ K1 → ⬆*[i] T1 ≡ U1 →
+lemma fqup_drops_strap1: ∀b,G1,G2,L1,K1,K2,T1,T2,U1,i. ⬇*[i] L1 ≘ K1 → ⬆*[i] T1 ≘ U1 →
                          ⦃G1, K1, T1⦄ ⊐[b] ⦃G2, K2, T2⦄ → ⦃G1, L1, U1⦄ ⊐+[b] ⦃G2, K2, T2⦄.
 #b #G1 #G2 #L1 #K1 #K2 #T1 #T2 #U1 *
 [ #HLK1 #HTU1 #HT12
@@ -42,5 +42,5 @@ lemma fqup_drops_strap1: ∀b,G1,G2,L1,K1,K2,T1,T2,U1,i. ⬇*[i] L1 ≡ K1 → 
 ]
 qed-.
 
-lemma fqup_lref: ∀b,I,G,L,K,V,i. ⬇*[i] L ≡ K.ⓑ{I}V → ⦃G, L, #i⦄ ⊐+[b] ⦃G, K, V⦄.
+lemma fqup_lref: ∀b,I,G,L,K,V,i. ⬇*[i] L ≘ K.ⓑ{I}V → ⦃G, L, #i⦄ ⊐+[b] ⦃G, K, V⦄.
 /2 width=6 by fqup_drops_strap1/ qed.